Mitsubishi Electric 800 Series Instruction Manual (Function page 39

Parameters referred to
Pr.7 Acceleration time, Pr.8 Deceleration
Pr.79 Operation mode selectionpage 250
2.5.2 Setting the frequency with switches (multi-speed
setting)
• Use the RUN key on the operation panel to give a start command.
• Turn ON the RH, RM, or RL signal to give a frequency command (multi-speed setting).
• Set Pr.79 Operation mode selection = "4" (External/PU combination operation mode 2).
[Connection diagram]
High speed
Middle speed
Low speed
Switch
The following shows the procedure to operate at a low speed (10 Hz).
Operating procedure
1.
Turning ON the power of the inverter
The operation panel is in the monitor mode.
2.
Changing the operation mode
Set "4" in Pr.79. The PU LED and EXT LED turn ON. (To change the setting, refer to
3.
Setting the frequency
Turn ON the low-speed switch (RL signal).
4.
Start → acceleration → constant speed
Press the RUN key to start running. The frequency value on the monitor increases according to the setting of Pr.7
Acceleration time, and "10.00" (10.00 Hz) appears on the monitor.
5.
Deceleration → stop
Press the STOP/RESET key to stop. The frequency value on the monitor decreases according to the setting of Pr.8
Deceleration time, "0.00" (0.00 Hz) appears on the monitor, and the motor stops rotating. Turn OFF the low-speed
switch (RL signal).
NOTE
• The initial value is 60 Hz for terminal RH in Group 1 (50 Hz in Group 2), 30 Hz for terminal RM, and 10 Hz for terminal RL. (To
change the settings, use Pr.4, Pr.5, and Pr.6, respectively.)
• In the initial setting, if two or more speed switches (signals) are simultaneously turned ON, priority is given to the switch (signal)
for the lower speed. For example, when both RH and RM signals turn ON, the RM signal (Pr.5) has the higher priority.
• Up to 15-speed switching operation can be performed.
• Up to two external input terminals are available for the Ethernet model. Use Pr.178 STF/DI0 terminal function selection and
Pr.179 STR/DI1 terminal function selection to assign the functions to terminals DI0 and DI1.
Parameters referred to
Pr.4 to Pr.6 (Multi-speed setting)page 273
Pr.7 Acceleration time, Pr.8 Deceleration
Pr.79 Operation mode selectionpage 250
Pr.178 STF/DI0 terminal function
38
2. Basic Operation
2.5 Basic operation procedure (PU operation)
timepage 232
Inverter
RH
RM
RL
SD
timepage 232
selectionpage 368
Operation panel
Speed 1
(High speed)
Speed 2
(Middle speed)
Speed 3
(Low speed)
Time
ON
RH
ON
RM
ON
RL
page 30.)